GDB进入动态链接器（ld.so）代码 [英] GDB step into Dynamic linker(ld.so) code

问题描述

我想在我的普通 c 代码中使用ld.so代码。
我试图在 TUI 模式下通过GDB进行代码流可以看到代码和程序集。

为此，我还安装了 libc-dbg binutils-source 来自ubuntu软件包管理器的软件包。
GDB可以找到 ld.so 本身的调试符号，我可以在指令级使用 si 但我无法步入源代码级别，因为GDB无法找到 ld.so 的源代码并且显示无可用源代码。

如何让GDB找到 ld.so 的来源，以便我还可以看到 ld.so 源中的哪一行实际上正在执行中。

我正在使用 Ubuntu 12.10 64bit with GCC 4.8.2

解决方案

如果你有libc的源代码可用，你可以使用 dir 命令将源代码添加到gdb的源代码路径中： Source_Path

编辑：调试libc相关文件（在Ubuntu发行版中），您需要：

1. 通过安装libc6-dbg包获取libc的调试信息。
   
2. 通过启用源代码库（通过运行 software-sources 并检查启用源代码存储库）并运行 apt-get源libc6


3. 将libc的调试信息添加到LD_LIBRARY_PATH中： export LD_LIBRARY_PATH = / usr / lib / / code>或 LD_LIBRARY_PATH = / usr / lib / debug gdb< application>


4. 添加c文件的完整路径到gdb的源路径，这是： dir directory_path_libc_source / stdio-common




I wanted to step into the code of ld.so whenever it will be used in my normal c code. I am trying to code flow through GDB in the TUI mode where you can see both source code and assembly as you step over the code.

For this I also installed libc-dbg binutils-source package from ubuntu package manager. GDB can find the debug symbols for the ld.so itself and I can step at the instruction level that is using si but I cant step at the source level as GDB is not able to find the source for ld.so and shows NO Source Available.

How can I make GDB find the source for ld.so so that I can also see which line in the ld.so source is actually being executed.

I am using Ubuntu 12.10 64bit with GCC 4.8.2

解决方案

If you've libc's source code available, you can add sources to gdb's source path with dir command: Source_Path

Edit: To debug libc related files (in a Ubuntu distro) you would need to:

1. Get libc's debug information by installing libc6-dbg packet.
2. Get libc's source code by enabling source repositories (by running software-sources and and checking "enable source code repositories") and running apt-get source libc6
3. Add libc's debug information into LD_LIBRARY_PATH: export LD_LIBRARY_PATH=/usr/lib/debug or LD_LIBRARY_PATH=/usr/lib/debug gdb <application>
4. Add full path to c file to gdb's source path, this is: dir directory_path_libc_source/stdio-common

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